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                            <div style="color:gray; word-break: break-all; font-size:12px;">原英文版地址: <a href="https://www.elastic.co/guide/en/elasticsearch/reference/7.7/xpack-rollup.html" rel="nofollow" target="_blank">https://www.elastic.co/guide/en/elasticsearch/reference/7.7/xpack-rollup.html</a>, 原文档版权归 www.elastic.co 所有<br/>本地英文版地址: <a href="../en/xpack-rollup.html" rel="nofollow" target="_blank">../en/xpack-rollup.html</a></div>
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<strong>重要</strong>: 此版本不会发布额外的bug修复或文档更新。最新信息请参考 <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html" rel="nofollow">当前版本文档</a>。
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<span class="breadcrumb-node">Rolling up historical data</span>
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<a id="xpack-rollup"></a>Rolling up historical data<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/rollup/index.asciidoc">edit</a><a class="xpack_tag" href="https://www.elastic.co/subscriptions"></a>
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<p>This functionality is experimental and may be changed or removed completely in a future release. Elastic will take a best effort approach to fix any issues, but experimental features are not subject to the support SLA of official GA features.</p>
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<p>Keeping historical data around for analysis is extremely useful but often avoided due to the financial cost of
archiving massive amounts of data.  Retention periods are thus driven by financial realities rather than by the
usefulness of extensive historical data.</p>
<p>The Elastic Stack data rollup features provide a means to summarize and store historical
data so that it can still be used for analysis, but at a fraction of the storage
cost of raw data.</p>
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